Plate for filter-presses



(No Model.) -2 Shee1',s-Sheet` 1.

J. P. BOETTIGER. PLATE FOR FILTER PRESSES.

Patented Mar. 29, 1892.

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(No Model.) 2 Sheets-Sheet 2.

J. P. BOETTIGER.

PLATE FOR FILTER PRESSES.

Padallted Mar. 29, 1892.

NITE STATES PATENT OFFICE.

JOHN PHILIP BOETTIGER, or OOLD SPRING, NEW YORK.

PLATE FOR FILTER-PRESSES.

SPECIFICATION forming part of Letters Ifatent No. 471,741, dated March 29, 1892.

Application filed May 28, 1891. Serial No. 394,376. (No model.)

T0 all whom it may concern:

Be 'it known that I, JOHN PHILIP Bonr- TIGER, of Cold Spring, in the county of Putnam and State of New York, a citizen of the German Empire, have invented certain new and useful Improvements in Plates for Filter-Presses, of which the following is a specication.

This invention has reference to an improved plate for lter-presses by which the separation of the substance to be filtered is produced with greater facility and by a considerably reduced pressure; and the invention consists of a plate or element for lterpresses, which is composed of two perforated disks and a wire-screen interposed between said disks and. riveted with the same, the

disks having projecting lugs, the shanks of which are riveted to said disks, so as to support the plate on the longitudinal supporting-bars of the filter-press. Each plate has an opening for the material to be filtered, andis separated from the next adjoining plate by a ring-shaped frame l having projecting lugs also resting on the longitudinal bars,

whereby the material to be filtered can pass readily from one chamber to the other.

In the accompanying drawings, Figure 1 represents a side elevation of my improved plate for filter-presses, showing a portion of one of its perforated disks broken away so as to show the intermediate Wire-screen. Fig. 2 is a vertical transverse section of a portion of the plate shown in Fig. l, drawn on a larger scale. Fig. 4 is a side elevation of the ring-shaped frame interposed between two adjacent filtering-plates, and Fig. 3 is a vertical transverse section of the same on line 4 4, Fig. 4. Fig. 5 is a vertical central transverse section of the filter.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a and a. represent two perforated disks of sheet metal or other suitable material, which disks are riveted together by suitable rivets d near the center and circumference of the same. Be-

tween the perforated disks a a is interposed a wire screen e, of which small segmental Y portions are out off at diametrioally opposite points, so as to permit the inserting between the disks a a of the Shanks f of two outwardly-extending lugs f, which shanks are attached by rivets f2 to the perforated disks a and a', the projecting lugs serving to support the'ltering-plate on the longitudinal su pporting-bars b b of the filter-press, as shown clearly in Fig. l.

The material to be filtered is supplied by a bars b b, and between each pair of said plates is placed a filtering-cloth of any suitable or usual material, the whole being inc losed and held in a casing as usual andcwell-known in devices of this character. v

The advantages of my improved plate for filter-presses are, first, that the material to be filtered can readily pass through the plates without the high resistance heretofore experienced when forcing the same through the press, inasmuch as the filtered-off substance can pass along the intermediate wire-screen between the disks to the lower part of the press, from which it is conducted off; sec-v ondly, the plates can be quickly and cheaply manufactured; and, lastly, the filtering process is expedited and carried out at a lower pressure and in an easier and more effective 11131111612 Having thus described my invention, I claim as new and desire to secure by Letters Patent- In a filter-press, the combination of ringshaped frames having projecting lugs at diametrically-opposite sides and press-plates alternating with said frames, composed of a central wire-screen having recesses at diametrically opposite points and perforated disks riveted to opposite sides of said wirescreen, projecting lugs in line with the lugs of the ring-shaped frames, the Shanks of said my invention I have Signed my name 1n preslugs being set into the recesses of the Wireence of Inwo subscribing W1tnesses. screen and riveted to the disks,a,ndltering e f ER cloths disposed upon the outer sides 0f the JOHN PHILIP BOEFTIG 5 perforated disks, substantially as shown and Witnesses:

described. Y y PAUL GOEPEL, In testimony that I claim the foregoing as A. M. BAKER. 

